| 主权项 |
1. A medical device, comprising:
an elongate member having a proximal end and a distal end, wherein the distal end of the elongate member includes a distal portion defining an end face and a cavity extending distally therefrom, wherein the distal portion further includes a plurality of sections configured to transition between a first position and a second position different than the first position, and the plurality of sections are in contact in the first position and, wherein, when the plurality of sections are in the first position, a distal end of the cavity is closed, and wherein each of the plurality of sections includes a pair of edges each extending from a proximal end to a distal end of the corresponding section, and wherein, in the second position, adjacent edges of adjacent sections of the plurality of sections are unconnected by material to define an opening between the adjacent edges such that a circumferential space between the adjacent edges are free of material; and a mechanism configured to adjust a volume of the cavity by moving at least one of the plurality of sections from the first position to the second position. |
